LED白光照明用(Y_(0.98-x)Sr_x)_3Al_5O_(12):Ce_(0.06)和(Y_(0.98-x)Ba_x)_3Al_5O_(12):Ce_(0.06)系列荧光粉的晶相与荧光光谱  

Crystalline Phases and Fluorescence Spectra of (Y_(0.98-x)Sr_x)_3Al_5O_(12):Ce_(0.06) and (Y_(0.98-x)Ba_x)_3Al_5O_(12):Ce_(0.06) Phosphors for White LED

作　　者：张宝昌[1] 刘静[2] 张德文[1] 孙淑清[2] 

机构地区：[1]长春工业大学化学与生命科学学院,吉林长春130021 [2]天津大学理学院,天津300072

出　　处：《化学工业与工程》2011年第1期13-16,共4页Chemical Industry and Engineering

摘　　要：本研究采用较温和的高温固相法,用碱土金属离子Sr2+和Ba2+取代Y3+离子进行基质取代,合成了一系列(Y0.98-xSrx)3Al5O12:Ce0.06和(Y0.98-xBax)3Al5O12:Ce0.06荧光粉。运用XRD对荧光粉进行了表征,试验结果表明:在一定的掺杂取代范围内,这些体系具有立方石榴石结构。运用荧光光谱仪对荧光粉的发光性能进行了表征,试验结果表明:当用Sr2+或Ba2+取代Y3+离子时,随着Sr2+、Ba2+取代量的增大,发射峰峰值不变,发光强度都是先增大后减小,分别在x=0.10和0.05时达到最大值。这可能是电荷补偿效应的作用,即用2价的Sr2+或Ba2+取代3价的Y3+产生的负电荷补偿Ce4+转化成Ce3+所需要的负电荷。In this paper,a series of（Y0.98-xSrx）3Al5O12：Ce0.06 or（Y0.98-xBax）3Al5O12：Ce0.06 phosphors were prepared using moderate high temperature solid-state reaction.The products were analyzed by XRD,the results show that all systems have cubic garnet structures when doping concentration is less than 0.10 for Sr2 ＋ ions or 0.05 for Ba2 ＋ ions.The products were characterized by luminescence spectra,the results indicate that the emission spectra peak don＇t move with the increase of the dopant concentration of Sr2 ＋ or Ba2 ＋,but the luminescent intensity increases with increasing Sr2 ＋ or Ba2 ＋ concentration and reaches maximum till x = 0.10（for Sr2 ＋） or x = 0.05（for Ba2 ＋） and then decreases.This may attribute to the effect of charge compensation in the preparation of those phosphors.

关 键 词：WLED 高温固相法 YAG:Ce3+荧光粉 

分 类 号：O73[理学—晶体学]